Flickr hosts over three billion images for its users—basically anyone with a Yahoo account, since the service was purchased by the search giant. Flickr’s raison d’être is sharing; if you want to do any image editing or manipulation, Flickr leaves that to other products (like the online-only Picnik or Yahoo’s own Jumpcut). Flickr isn’t limited to still images, by the way; it has supported video for a few months.

Flickr hosts over three billion images for its users—basically anyone with a Yahoo account, since the service was purchased by the search giant. Flickr’s raison d’être is sharing; if you want to do any image editing or manipulation, Flickr leaves that to other products (like the online-only Picnik or Yahoo’s own Jumpcut). Flickr isn’t limited to still images, by the way; it has supported video for a few months.

Flickr doesn’t restrict the resolution of images you upload except by file size: 20MB per photo at most (or 10MB max with a free account). Videos are a different story, having more restrictions: Only Pro users can upload videos at all, and even they are limited to 150MB and 90 seconds per video. Obviously Flickr’s in no danger of overtaking YouTube, Vimeo, or even Facebook as the primo video-sharing site. The feature exists as an extra for photo sharers who want to show off the occasional home movie.

Yahoo account, since the service was purchased by the search giant. Flickr’s raison d’être is sharing; if you want to do any image editing or manipulation, Flickr leaves that to other products (like the online-only Picnik or Yahoo’s own Jumpcut). Flickr isn’t limited to still images, by the way; it has supported video for a few months.